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"As with the current £2 coins, the 2017 £1 coin is bi-metallic - in this case an outer 'gold' coloured nickel-brass band with an inner 'silver' coloured cupro-nickel disc," he explained.

(Image: 2017 Getty Images Matt Cardy)

"Because of this, any potential die errors during production, which occurs when the dies have become misaligned, could be worth a lot of money.

"Punters should pay attention to both the floral crown on the reverse side for any rotations, as well as the Queen's head, which should sit directly above the new bevelled edge."

The owner of the coin design is reported to have sold his for £200 and the prices are only goign up as demand increases.

"These new £1 trial coins are fascinating, especially considering the financial precedent of the £2 trial coins in 1994, which have since become one of the most sought after collectable coins in Britain," Alex added.

"If these new trial coins turn out to be as valuable as 1994’s, then anyone who gets their hands on them now could be sitting on a future goldmine."